While people in Japan, Canada, and other nations are enjoying significant gains in life expectancy every year, most counties within the United States are falling behind, according to a new study by the Institute for Health Metrics and Evaluation (IHME) at the University of Washington.

Human-induced pluripotent stem (iPS) cells can be directed to develop into light-sensing photoreceptor cells of the retina. Researchers have used cutting-edge stem cell technology to correct a genetic defect present in a rare blinding disorder, another step on a promising path that may one day lead to therapies to reverse blindness caused by common retinal diseases such as macular degeneration and retinitis pigmentosa which affect millions of individuals.